Panasonic Bails on Plasma TVs
Those of us who swear by our plasma screen HDTVs will soon be swearing in general, as Panasonic will be shutting down its plasma display panel (PDP) plants by the end of March. In 2010, plasma TVs accounted for about 40
percent of the market, and Panasonic had a 40 percent share of it. However, plasma's share is expected to drop to five
percent this year. Reportedly, Panasonic has lost $15 billion in PDP display production and will refocus on products
outside the TV market. NV
CIRCUITS and DEVICES
January 2014 11
Better Ultrabook Audio
One might think that "Ultrabook" is just another meaningless marketing term but, in fact, Intel (which
calls the shots) spells out quite a few required specs,
including the use of a low voltage Intel Core processor.
Unfortunately for music fans, low voltage tends to
translate into crummy audio quality. Next-generation
Ultrabooks that employ a new speaker driver from Dialog
Semiconductor ( www.dialog-semiconductor.com) should
prove to be more satisfactory, fortunately.
The DA7202 is the first product in the company's
range of Class D audio products designed to deliver three
times the power output for Ultrabooks, tablets, and
various speaker accessories powered by a dual-cell battery
pack. Typically, most mobile devices use a CODEC with
an integrated Class D amp that can't drive the speakers
with more than 1A. The DA7202 will drive up to 3. 5
Wrms. In addition, having a direct connection from the
battery to the amp eliminates DC-DC power loss.
According to Dialog, the increased power does not compromise sound quality, and the chip
provides a 100 dB signal-to-noise ratio. ;
; Block diagram of the DA7202.
INDUSTRY and the PROFESSION